Синтез, структура и свойства композитных протонпроводящих мембран на основе перфторированного сополимера типа Нафион с наночастицами Zr1-xYxO2-0.5x

Наночастицы Zr_1-xY_xO_2-0.5x были введены в сульфокислотную форму перфторированного сополимера Нафион типа перед формированием мембраны для улучшения ее водоудерживающей способности, термической стабильности и протонной проводимости. Поскольку условия формирования наночастиц могут существенно влиять на их размер, фазовый состав, морфологию и химию поверхности, в работе были рассмотрены разные подходы по синтезу наполнителя. Было установлено, что среди мокрохимических методов, которые применялись для получения наночастиц на основе диоксида циркония, наиболее перспективным с точки зрения повышения поверхностной протонной проводимости композитных мембран является сольвотермальный синтез. Данный метод обеспечивает малый размер, большую удельную площадь поверхности и высокую степень гидрофильности наночастиц, вследствие чего их введение в перфторированный сополимер Нафион типа повышает влагоудержание мембраны и способствует улучшению ее протонпроводящих свойств. В случае наночастиц Zr_1-xY_xO_2-0.5x сформированных в условиях растворного горения, их более гидрофобная поверхность не способствовала повышению содержания влаги в перфторированном сополимере, но позволила повысить его максимально возможную рабочую температуру на 20°С.

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